EP4395100A1 - Hochspannungs-energieübertragungsanordnung - Google Patents

Hochspannungs-energieübertragungsanordnung Download PDF

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Publication number
EP4395100A1
EP4395100A1 EP22217181.1A EP22217181A EP4395100A1 EP 4395100 A1 EP4395100 A1 EP 4395100A1 EP 22217181 A EP22217181 A EP 22217181A EP 4395100 A1 EP4395100 A1 EP 4395100A1
Authority
EP
European Patent Office
Prior art keywords
transfer
network element
arrangement
main
gate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22217181.1A
Other languages
English (en)
French (fr)
Inventor
Thomas Westerweller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Energy Global GmbH and Co KG
Original Assignee
Siemens Energy Global GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Energy Global GmbH and Co KG filed Critical Siemens Energy Global GmbH and Co KG
Priority to EP22217181.1A priority Critical patent/EP4395100A1/de
Publication of EP4395100A1 publication Critical patent/EP4395100A1/de
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
    • H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/75—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M7/757—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H02M7/7575—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only for high voltage direct transmission link
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/08—Three-wire systems; Systems having more than three wires
    • H02J1/082—Plural DC voltage, e.g. DC supply voltage with at least two different DC voltage levels

Definitions

  • a DC network comprises one or several connected DC lines.
  • DC networks usually comprise further DC network elements to initiate and/or operate the power transmission through the network, namely power exchange elements such as converters (AC/DC and/or DC/DC), energy storage devices, DC choppers, DC cables, DC overhead lines (or cables), DC circuit breakers, energy sources (e.g. PV plants) and suitable loads.
  • power exchange elements such as converters (AC/DC and/or DC/DC), energy storage devices, DC choppers, DC cables, DC overhead lines (or cables), DC circuit breakers, energy sources (e.g. PV plants) and suitable loads.
  • the present invention particularly relates to HVDC networks, i.e. networks with a nominal voltage of more than 100 kV DC.
  • HVDC multi-terminal or meshed systems In contrast to known and implemented point-to-point HVDC connections, HVDC multi-terminal or meshed systems generally have the task of connecting more than one DC line, more than two AC/DC converters and other operating equipment.
  • DC network elements are connected to a main bus via devices providing the necessary functionalities to open and close the connection between the respective element and the bus, during normal operation as well as under fault conditions.
  • the set of devices installed between the main bus and the network element is usually referred to as a gate.
  • the amount of equipment needed and thus the investment costs for a switching station can be significant.
  • the object of the present invention is therefore to provide a high-voltage power transmission arrangement as cost-effective and reliable as possible.
  • the high-voltage power transmission arrangement comprises a first DC network element, a second DC network element, a main bus connected to the first DC network element via a first main gate, and with the second DC network element via a second main gate, a transfer bus connected to the first DC network element via a first transfer switch, with the second DC network element via a second transfer switch, and with the main bus via a transfer gate, wherein each of the main and transfer gates comprises a fault separation device and a residual current switch.
  • the transfer gate can be configured in parallel to any other gate by means of the transfer bus.
  • the transfer gate comprises functionalities for opening the connection between the transfer bus and the main bus, it can re-open immediately upon unsuccessful closing (e.g., a persisting fault condition in an energized network element). After coupling the network element with the main bus via the transfer gate, the transfer gate is by-passed by closing the corresponding main gate. Deactivation of a peak current suppression functionality of the transfer bus is not necessary at any time.
  • the arrangement according to the invention provides an improved switching station significantly reducing the amount of installed equipment but adding increased availability of network elements during gate maintenance.
  • the first and/or the second DC network elements each comprise DC operating equipment, in particular a DC transmission line and/or an AC/DC converter.
  • the first and/or the second transfer switch are disconnectors.
  • Disconnectors are relatively cost-efficient devices with low breaking capacity, which effectively disconnect a line after the current has been interrupted by some other switching device.
  • the peak current suppression device is deactivated.
  • the deactivation of the current suppression function is advantageous when the transfer gate is used as a substitute for a regular gate during maintenance. In this case the transfer gate will constantly carry the operational currents of the corresponding element. The remaining gates in the switching station are still able to open. However, discharge and current suppression functionalities are not available during this period.
  • the fault separation device can comprise a parallel connection of a surge arrester and a fault current switch that is able to open under fault current conditions in a way that the current is commutated into the arrester.
  • fault separation is understood as suppressing currents (e.g., fault currents) flowing into a predefined network area.
  • each of the transfer and main gates comprise a disconnecting switch.
  • the disconnecting switches provide a galvanic isolation between the main bus and the network elements in case the network elements shall be disconnected from each other.
  • said transfer gate further comprises a current sensing device and/or a voltage sensing device.
  • the current and/or voltage measurements can be used for a suitable control of the current and/or voltage in the DC node, particularly at a DC side of a converter.
  • the transfer gate can further comprise a converter for an active damping of voltage fluctuations.
  • the converter can be used to replace other damping equipment such as resistors or choking coils.
  • the present invention further relates to a bipole HVDC station.
  • Such stations often constitute an integral part of a DC network, where the converters of the HVDC station are network elements which shall be connected to the DC network in a possibly cost-efficient and reliable manner.
  • the bipole HVDC station comprises a first converter connected to a positive DC pole via an arrangement according to claim 1 and a second converter connected to a negative DC pole via another arrangement according to claim 1.
  • the first converter is arranged between the positive DC pole and a neutral pole, whereas the second converter is arranged between the neutral pole and the negative pole.
  • the neutral pole can hereby comprise a ground electrode, i.e., a non-insulated conductor system buried into ground or sea, designed for continuous operational currents.
  • FIGS 1 and 2 schematically show embodiments of the arrangement according to the invention.
  • the DC side of the first converter is connected to a DC network 109 (a first bus bar of the DC network) via an arrangement 110 according to the embodiment shown in figure 1 .
  • the DC side of the second converter 102 is connected to the DC network 109 (a second bus bar of the DC network) via another arrangement 111 as shown in figure 1 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Direct Current Feeding And Distribution (AREA)
EP22217181.1A 2022-12-29 2022-12-29 Hochspannungs-energieübertragungsanordnung Pending EP4395100A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22217181.1A EP4395100A1 (de) 2022-12-29 2022-12-29 Hochspannungs-energieübertragungsanordnung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22217181.1A EP4395100A1 (de) 2022-12-29 2022-12-29 Hochspannungs-energieübertragungsanordnung

Publications (1)

Publication Number Publication Date
EP4395100A1 true EP4395100A1 (de) 2024-07-03

Family

ID=84689110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22217181.1A Pending EP4395100A1 (de) 2022-12-29 2022-12-29 Hochspannungs-energieübertragungsanordnung

Country Status (1)

Country Link
EP (1) EP4395100A1 (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5619076A (en) * 1994-12-19 1997-04-08 General Signal Power Systems, Inc. Method and apparatus for connection and disconnection of batteries to uninterruptible power systems and the like
WO2013139392A1 (en) * 2012-03-21 2013-09-26 Abb Technology Ltd Switching system for a dc grid

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5619076A (en) * 1994-12-19 1997-04-08 General Signal Power Systems, Inc. Method and apparatus for connection and disconnection of batteries to uninterruptible power systems and the like
WO2013139392A1 (en) * 2012-03-21 2013-09-26 Abb Technology Ltd Switching system for a dc grid

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"IEC TS 63291-1 ED1: HVDC Grid Systems and connected Converter Stations - Functional Specifications -<br /> Part 1: Guidelines", 24 December 2021 (2021-12-24), pages 1 - 121, XP082031545, Retrieved from the Internet <URL:https://api.iec.ch/harmonized/documents/download/1153903> [retrieved on 20211224] *
BARNES MIKE ET AL: "HVDC Circuit Breakers-A Review", IEEE ACCESS, IEEE, USA, vol. 8, 23 November 2020 (2020-11-23), pages 211829 - 211848, XP011825270, DOI: 10.1109/ACCESS.2020.3039921 *

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